At a certain instant an object is moving to the right with speed 1.0 m/s and has a constant acceleration to the left of 1.0 m/s^2.At what later time will the object momentarily be at rest? How do you do this?

Answer 1

every second the velocity decreases by 1.0 m/s.

Looks like it will take 1.0 seconds to stop.

time = speed/acceleration

(m/s) / (m/s^2) = s